1201515 has 16 divisors (see below), whose sum is σ = 2197248. Its totient is φ = 549216.

The previous prime is 1201513. The next prime is 1201523. The reversal of 1201515 is 5151021.

It is not a de Polignac number, because 1201515 - 2¹ = 1201513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

1201515 is a modest number, since divided by 1515 gives 120 as remainder.

1201515 is a lucky number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1201494 and 1201503.

It is not an unprimeable number, because it can be changed into a prime (1201513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5617 + ... + 5826.

It is an arithmetic number, because the mean of its divisors is an integer number (137328).

2^1201515 is an apocalyptic number.

1201515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1201515 is a deficient number, since it is larger than the sum of its proper divisors (995733).

1201515 is a wasteful number, since it uses less digits than its factorization.

1201515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11458.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 1201515 is about 1096.1363966222. The cubic root of 1201515 is about 106.3105583265.

Adding to 1201515 its reverse (5151021), we get a palindrome (6352536).

The spelling of 1201515 in words is "one million, two hundred one thousand, five hundred fifteen".